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Zone-Plate Based Nanospectroscopy with Soft X-Rays at the SLS

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Fink R., Hub C., Tzvetkov G.
Acta Physica Polonica A
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2009
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vol. 115
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issue 2
462-466
EN
With the advance of nanostructuring techniques and the availability of third-generation synchrotron sources, Fresnel-type zone plate optics is widely used for nanospectroscopic investigations with resolutions of several 10 nm. Whereas hard X-rays commonly use diffraction or elemental contrast (e.g. using X-ray fluorescence), soft X-rays are favored to utilize the spectroscopic contrast in the near-edge region of the absorption edge. In particular, for soft materials, the relevant C-, N- and O 1s absorption edges show distinct resonances which allow fingerprint-type chemical identification, even in water surroundings. Few selected examples from modern material science will be discussed to demonstrate that the combination of X-ray absorption spectroscopy with high spatial resolution yields new insight into the nanoscale properties of these materials.
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Applications of a Compact "Water Window" Source for Investigations of Nanostructures Using SXR Microscope

63%
Torrisi A., Wachulak P., Fahad Nawaz M., Bartnik A., Adjei D., Vondrová Š., Turňová J., Jančarek A., Fiedorowicz H.
Acta Physica Polonica A
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2016
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vol. 129
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issue 2
169-171
EN
A compact soft X-ray microscope based on a nitrogen double-stream gas puff target soft X-ray source, operating at He-like nitrogen spectral line at the wavelength of λ =2.88 nm is presented. The desk-top size microscope was successfully demonstrated in transmission mode using the Fresnel zone-plate objective and it is suitable for soft X-ray source microscopy in the "water window" spectral range (λ = 2.3÷ 4.4 nm). Details about the soft X-ray source source, the microscope and an example of application in the biomedical field are shown and discussed.
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